165500066 has 16 divisors (see below), whose sum is σ = 268448256. Its totient is φ = 76224576.

The previous prime is 165500063. The next prime is 165500081. The reversal of 165500066 is 660005561.

165500066 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165500063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50186 + ... + 53381.

It is an arithmetic number, because the mean of its divisors is an integer number (16778016).

Almost surely, 2^165500066 is an apocalyptic number.

165500066 is a deficient number, since it is larger than the sum of its proper divisors (102948190).

165500066 is a wasteful number, since it uses less digits than its factorization.

165500066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103633.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 165500066 is about 12864.6828954312. The cubic root of 165500066 is about 549.0341904137.

The spelling of 165500066 in words is "one hundred sixty-five million, five hundred thousand, sixty-six".